The highest day temperature in May 2023 was 71°F. The lowest night temperature was 33°F. The average values for day and night temperatures during May were 53.5°F и 46.1°F respectivly.

The average sea surface temperature in May 2023 for Mackinac Island was 41.1°F. The maximum and minimum values were 34.6°F and 52.8°F respectively.

You can expect various weather conditions during May. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in May for Mackinac Island is 0.9 in. It makes may one of the least rainy months of the year.

The average wind speed in May is 9.1 mph. It makes May one of the most windless months of the year for Mackinac Island.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Mackinac Island in May is 7.8 hours.